Shoulder shaping attachment for road working machines



Jul fzs, 1953 L. JAHN 2,646,633

SHOULDER SHAPING ATTACHMENT FOR ROAD WORKING MACHINES Filed July 17. 1951 2 Shet's-Sheet 1 m 0 6 a v 5 5 5 g m 8 n z} U o m 6 go A E U U- f 9 9 O" V 8 o P m INVENTOR Q W\LL\AN\ L. JAHN July 28, 1953 w. L. JAHN 2,646,633

SHOULDER Sl-IAPING ATTACHMENT FOR ROAD WORKING MACHINES Filed July 17, 1851 2 Sheets-Sheet 2 Fig.2

WILL\AM L. JAHM BY wamflm WW ATTORNEYS Patented July 28, 1953 OFFICE SHOULDER SHAPING ATTACHMENT FOR ROAD WORKING MACHINES Villiam L. Jahn, Grand Forks, N. Dak. Application July 17, 1951, Serial No. 237,176

1 This invention relates to a shouldering attachment for road working machines, such as graders or the like, and more particularly has reference to an attachment of the character described adapted, when secured to a blade of a road working machine, to form or shape a shoulder of a selected angle and elevation adjacent a roadway over which said machine is moved.

To my knowledge, there is a considerable need, which has not been met by such shouldering attachments as have heretofore been devised, for an attachment as stated that can beeither attached to or wholly removed from the road working machine with maximum speed and facility; that will require no modification of the construction of the machine, except perhaps to a very minor extent; that will not involve redesigning of the machine or changes in the manufacturing practices used in building the machine; and that will be efficient in forming horizontal shoulders or inclined shoulders at any selected elevation relative to the road surface while providing for minimum wastage of the material used in forming the shoulder.

The main object of the present invention is to provide a machine attachment of the character described that will fulfill these needs.

Another important object is to provide'an attachment as described that will be swingably adjustable through vertical and horizontal planes, with said adjustments being controllable from the deck of the machine, while the machine is in operation, and with each of said adjustments being variable relative to the other at any time.

Another important object is to provide an attachment as stated wherein said vertical adjustment will be eff ciently adapted to form a distinct and straight shoulder line of a selected angle of inclination.

Another important object is to provide a construction, in an attachment as described, wherein the horizontal adjustment referred to will be effective to equalize material dumped upon the shoulder without drawing said material over upon a pavement newly laid upon the adjacent road surface.

Still another object is to provide, in a structure of the type stated, means for bodily shifting the attachment to selected levels of elevation relative to the main blade provided on a road working machine, thereby to allow the blade attachment to be lowered while still extending in parallelism with the main blade, thus to remove unwanted material from a shoulder before the replacement of new material upon the shoulder.

7 Claims. (01. s7 -155) Yet another object is to provide, in an attachment of the type stated, a construction wherein said last-named adjustment will allow the extension blade of the attachment to be elevated above the level ofthe main blade of theroad working machine while still retained parallel thereto, thus to form the shoulder to a level higher than the level of the paved road surface, and thus allow the rolling. and packing of a newly formed shoulder into the pavement level.

Referring to the drawings:

Figure 1 is a top plan view of a road grader and of an attachment formed in accordance with the present invention and mounted upon the blade of said grader; the dotted lines indicating one position to which the attachment is horizontally adjustable, a portion of the grader being broken away;

Figure 2 is a rear elevational view of the attachment, the dotted lines indicating a position to which the attachment is vertically adjustable, the grader blade being shown fragmentarily;

Figure3 is an enlarged sectional view taken substantially on line 33 of Figure 2;

Figure l is a detail sectional view, still further enlarged, taken on line 44 of Figure 2;

Figure 5 is a fragmentary rear elevational view of the attachment, wherein the blade of the attachment has been bodily shifted vertically of the grader blade;

Figure 6 is a schematic view of the fluid pressure system. "Referring to the drawingsin detail, a road grader of conventional construction has been generally designated 1, and includes the main blade 2, which, in accordance with conventional practice, is adjustably mounted upon the grader.

Integral or otherwise rigid'with the back surface of the main blade 2 are longitudinally extended, parallel'tongues 3 over which is slidably positioned a support plate 4, the top and bottom edges of 'which'are formed with inturned flanges 5 engageable with the respective tongues.

Rigidly" secured to and extended rearwardly from the top edge of the support plate 4 are ears 6 (Figure 4) between which is pivotally connected one end of a swinging latch. 1 adapted to be releasably engaged in registering notches}! and 9 of the plate land blade 2, respectively. As seen from Figure 2, the upper tongue of the main blade 2 is formed with a series of longitudinally spaced notches 9 in any of which the latch may engage. Thus, the support plate 4 can be readily removed wholly from the main blade'to permit us'e of the road grader without 24 outwardly, which has the effect of swingably lowering the extension blade. In this way an inclined shoulder of a selected angle will be formed by the extension blade during movement of the road working machine along the roadway.

If greater variation in the angle of inclination is desired, the extension rod 21 can be adjusted outwardly of the tube 26, and said rod and tube pinned in the new relationship.

Referring to Figure 4-, there is illustrated the means whereby the extension blade 2| is bodily shifted vertically of the main blade 2. This is accomplished by manual rotation of the screw I3 which has the eifect of lowering or elevating the extension blade, while still preserving the previously adjusted relationship of said extension blade and main blade. In other words, if the extension blade was previously adjusted, for example, to the angle of inclination shown in dotted lines in Figure 2, rotation of the screw I 3 would be operative to preserve the angular relationship between the blades while still elevating and lowering the extension blade bodily. Or, if, as illustrated in Figure 4, the extension blade extends outwardly in parallelism with the main blade, rotation of the screw is serves to position the bottom edge of the extension blade either higher or lower than the edge of the main blade, while still retaining said edges in parallel relation. In Figure 4, the extension blade is illustrated by way of example as having been adjusted downwardly relative to the main blade, and thus a shoulder S will be formed parallel to the surface of the roadway R, but at a lower elevation. This adjustment is particularly effective in scraping shoulders, preliminary to dumping of new material upon the shoulders for formation of a new shoulder upon the old one.

It is believed obvious that a shoulders can be formed parallel to but higher than the surface of the roadway R, and can be packed or rolled down to the plane of the paved road surface.

Whenever it is desired to use the road working machine for its ordinary purposes without the attachment, it is necessary merely to disengage the latch '11, permitting the support plate 4 to be removed from the main blade. This acts to remove not only the support plate, but also the extension blade and all the parts associated with said plate and extension blade, since said parts are mounted entirely upon these two parts of the structure.

What is claimed is:

1. The combination with a road machine having a main blade, of a shouldering attachment including a supporting plate removably and fixedly connected to said main blade; a. vertical screw mounted on said plate for rotation under the control of an operator; a follower threadably engaged with said screw for movement vertically of the screw responsive to rotation of the screw; an extension blade connected to the follower so as to swing vertically and horizontally upon the main blade, said vertical movement of the follower constituting means for bodily shifting the extension blade vertically of the main blade; and means carried by the supporting plate and operatively associated with the extension blade to efiect said vertical and swinging movements of the extension blade relative to the main blade.

2. The combination with a road machine having a main blade, of a shouldering attachment including a supporting plate removably and fixedly connected to said main blade; a vertical screw mounted on said plate for rotation under the control of an operator; a follower threadably engaged with said screw for movement vertically of the screw responsive to'rotation of the screw; an extension blade connected to the follower so as to swing vertically and horizontally upon the main blade, said vertical movement of the follower constituting means for bodily shifting the extension blade vertically of the main blade; and means carried by the supporting plate and operatively associated with the extension blade to effect each of said movements of the extension blade through vertical and horizontal planes, the second-named means I comprising hydraulic cylinders connected to the support plate, pistons in said cylinders operatively connected to the extension blade to exert pressuresthereagainst tending to swing the extension blade through said vertical and horizontal planes, and means for supplying fluid under pressure to each of said cylinders independently of the other.

3. The combination with a road machine having a main blade, of a shouldering attachment including a supporting plate removably and fixedly connected to said main blade; a vertical screw mounted on said plate for rotation under the control of an operator; a follower threadably engaged with said screw for movement vertically of the screw responsive to rotation of the screw; a shaft rigid with and extended laterally and .outwardly from the follower; an extension blade connected to said shaft to swing in a vertical plane, said extension blade swinging in a horizontal plane on rotation of said follower upon the screw, said rotation of the screw constituting means for bodily shifting the extension blade vertically of said plate; means for controlling vertical swinging movement of the extension blade including an arm pivotally connected at one end to and. upstanding from said plate to swing in a vertical plane, a hydraulic cylinder pivotally connected to said plate to swing in a vertical plane, a' pistonin said cylinder pivotally connected to the arm whereby to effect said swinging movement of the arm, and a telescopic link extending between the arm and extension blade; and means for controlling horizontal swinging movement of the extension blade including a second cylinder universally connected to said plate, and a piston in said second cylinder universally connected to the outer end of said shaft whereby to swing the shaft horizontally in an arcuate path about said screw.

4. The combination with a road machine having a main blade, of a shouldering attachment including a supporting plate connected to said main blade; a vertical screw mounted on said plate for rotation under the control of an operator; a follower threadably engaged with said screw for movement vertically of the screw responsive to rotation of the screw; an extension blade connected to the follower so as to swing vertically and horizontally upon the main blade, said vertical movement of the follower constituting means for bodily shifting the extension blade vertically of the main blade; and means carried by the supporting plate and operatively associated with the extension blade to effect said vertical and swing movements of the extension blade relative to the main blade.

5. The combination with a road machine having a main blade, of a shouldering attachment including a supporting plate connected to said main blade; a substantially vertical screw mounted on said plate for rotation under the amass control of :an operator; afiollowerthreadahly en gaged with said screw .for movement longitudinally lof the screw responsive to rotation of {the screw; extension blade connected to the follower so as to .swing upon the main blade about axes respectively arranged normally to and in alignment with the axis of rotation of said screw, said movement of the follower longitudinally of the screw constituting means for bodily shifting the extension l-b-lade substantially vertically of the main blade; andmeans carried by the supporting plate andioperatively associated with the extension blade to .efiect momements of the extension blade about the respective axes of swinging movement thereof. 7

.6. The combination with a road machine having a main blade, of a shouldering attachment including a supporting plate connected to said main blade; a substantially vertical .screwmounted on said plate for rotation under th control of an operator; a follower threadably engaged with said screw for movement longitudinally of the screw responsive to rotation of the screw; an extension :blade connected to the follower so as to swing upon the main blade about axes respectively arranged normally to and in alignment with the axis of rotation of said screw,.said movement of the iollower longitudinally .of the screw constitu'tingmeans for bodily shifting the exten- Sion blade substantially vertically of the main blade; andmeans carried by the supporting plate and opera'tively associated with the extension blade to effect movements of the extension blade about the respective :axes of swinging movement thereof, said second-named means comprising hydraulic cylinders, connected to the support plate, pistons in said cylinders operatively connected to the extension blade to exert pressures thereagainst tending toswlng the extension blade about said axes of swinging ,movement thereof, and means for supplying fluid under pressure to each of said cylinders independently of the other.

':7.- The combination with a road machine having ,a mainblade, of a shouldering attachment including a supporting plate connected to ,said main ,blade; a vertical screw mounted on said plate for rotation under the control of an operator; a follower threadably engaged with said screw for movement vertically of the screw responsive to rotation of the screw; a shaft rigid with and extended laterally and outwardly from the follower; an extension blade connected to said shaft to swing in a vertical plane, said extension blade swinging in a, horizontal plane on rotation of said follower upon the screw, said rotation of the screw constituting means for bodily shifting the extension .blade vertically of said plate; means for controlling vertical swinging movement of the extension blade including an arm pivotally connected at one end to and upstanding from said plate to swing in a vertical plane, a hydraulic cylinder pivotally connected 170283161 plate to swing in a vertical plane, a piston in said cylinder pivotally connected to the arm whereby to efiect said swinging movement of the arm, and a telescopic link extending between the arm and extension blade; and means for controlling ,horizontalsvvinging movement of the extension blade including a second cylinder universally connected to said plate, and a piston in said second cylinder universally connected to the outer end of said shaft whereby to swing the shaft horizontally in an arcuate path about said screw.

W'ILLIAM L. J AHN.

References Cited 'in the file of this patent UNIT-ED STATITES PATENTS Number Name Date 1,457,862 Stockland June 5, 1923 1393282 Porter Mar. 5, 1935 2,572,776 Smith Oct. 23, 1951 

